TM2361 (24JUN08) 9010-15-10 450DLC Excavator Operation and Tests 062608 PN=280 Diagnostic Information 4 Barometric Pressure Sensor Check NOTE: If sensor is not functioning, fuel may be injected at a lower level causing engine to lack power. Check to see if barometric sensor is working. Is barometric sensor functioning? YES: Go to Exhaust Emission Check. NO: Replace and retest. – – –1/1 5 Exhaust Emission Check Operate engine at full load rated speed. Does the engine emit excessive smoke? YES: There is Heavy white exhaust smoke: See Engine Emits Excessive White Exhaust Smoke Diagnostic Procedure diagnostic procedure. (Group 9010-15.) YES: There is Heavy black or gray exhaust smoke:
See Engine Emits Excessive Black or Gray Exhaust Smoke. diagnostic procedure. (Group 9010-15.) NO: Go to Fuel System Test. – – –1/1 9010 15 10 6 Fuel System Test Check fuel system in the following procedure. 1. Check the high pressure line and low pressure line for leaks, kinks, or obstructions. Check in the following order. • Fuel filters (water separator and final filters). • Fuel tank (pump strainer). • Fuel system lines. 2. Check fuel lines, fuel filter, and inside of the fuel tank for freezing or waxing. (cold temperatures) 3. Check the supply line inside the fuel tank for debris. 4. Supply fuel from a container other than the fuel tank. a.
Start the engine, operate the machine, and check for trouble symptoms. b. Replace the fuel in the fuel tank and lines. c. Bleed air from fuel, and check for trouble symptoms again. Are any fuel system problems present? YES: Repair and replace necessary parts and retest. NO: Go to EGR Control System Check. – – –1/1